1. It hurts more at night and everytime I use it. Keeping it warm helps so I usuallu sleep on my left side.
2. I can only lift the arm so that the upper arm is parallel to my body. I cannot rotate backwards.
3. I do not have diabetes, but take metformin for insulin resistance. I also have a BMI of 48. It started when I was using my left arm to lift me from a chair or bed, but have not done so for about 5 months and yet it still hurts. It hurts from the shoulder to my elbow, and on the back of the shoulder.